US2656483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge device of the resonator type
Assignee: Individual
•
Filing: 1948-08-02
•
Granted: 1953-10-20
•
Expires: 1968-08-02
Abstract
No abstract record available.
Inventors
- 👤 Apstein Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:23
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2275480A
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CH215602A
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US2399325A
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US2368328A
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US2288694A
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US2289319A
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US2463617A
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US2409179A
Cited
US2407708A
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US2412372A
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US2509419A
Cited
US2608669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |